DRC-2015-002395 - 0901a06880529ea0

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Energy Fuels Resources (USA) Inc.
225 Union Blvd. Suite 600
Lakewood, CO, US, 80228
303 974 2140 ENERGYFUELS
www.energyfuels.com
May 6,2015
VIA PDF AND OVERNIGHT DELIVERY DRC-2015-002395
Rusty Lundberg,
Director, Division of Radiation Control
Utah Department of Environmental Quality
195 North 1950 West
P.O. Box 144850
Salt Lake City, UT 84114-4850
Re: State of Utah Ground Water Discharge Permit No. UGW370004
White Mesa Uranium Mill - Notice Pursuant to Part I.G.I (a)
Dear Mr. Lundberg:
The White Mesa Mill (the "Mill") performed first quarter ("Ql") groundwater monitoring during the
period from January 1, to March 31, 2015 under the August 24, 2012 version of the Mill's Groundwater
Discharge Permit (the "GWDP"). All analytical data needed for comparison to the GWCLs were
received during the period ending March 31, 2015.
Pursuant to Part I.G.I.a) of the GWDP, (August 24, 2012) please take notice that the concentrations of
specific constituents in the monitoring wells highlighted in yellow and bold italics in the columns for this
quarter in the attached Table 1 exceeded their respective GWCLs. For ease of review, Table 1 has been
formatted to simplify the tracking of any continued exceedances from one monitoring period to the next
by charting ongoing monitoring of the same well in the same row, and by highlighting exceedances (in
color and bold italics).
Part I.G. 1 c) of the GWDP states "that the Permittee shall prepare and submit within 30 calendar days to
the Executive Secretary a plan and a time schedule for assessment of the sources, extent and potential
dispersion of the contamination, and an evaluation of potential remedial action to restore and maintain
groundwater quality to ensure that Permit limits will not be exceeded at the compliance monitoring point
and that DMT or BAT will be reestablished." The summary below relating to Ql 2015 exceedances
includes, for each exceedance, a brief discussion of whether such a plan and schedule is or is not required
or appropriate at this time in light of other actions currently being undertaken by Energy Fuels Resources
(USA) Inc. ("EFRI") or in light of other reports submitted by EFRI, and as determined by Division of
Radiation Control ("DRC") Staff. A description of the other actions and reports which have affected the
requirement to submit a plan and time schedule are as follows:
1. Nitrate + nitrite and chloride in monitoring wells at the site have been the subject of ongoing
investigations at the Mill. Based on the results of the previous investigations, EFRI and the
Director acknowledge that it has not been possible to date to determine the source(s), cause(s),
attribution, magnitudes of contribution, and proportion(s) of the local nitrate + nitrite and chloride
in groundwater. EFRI submitted a Corrective Action Plan ("CAP") in February 2012 for nitrate
+ nitrite and chloride in groundwater. The CAP was approved on December 12, 2012 and the
activities associated with the CAP are on-going. Based on information provided by DRC in
Letter to Mr. Rusty Lundberg
May 6,2015
Page 2
teleconferences on April 27, and May 2, 2011, due to the ongoing activities and actions, the 30-
day plan and schedule for assessment is not required for nitrate + nitrite and chloride exceedances
at this time.
2. As discussed in previous quarterly groundwater sampling reports, the background levels and
GWCLs for pH were established based on eight or more quarters of laboratory data, which are
historically higher than field data. EFRPs letter to the Director dated January 31, 2011 proposed
the recalculation of the GWCLs for field pH. Following the statistical evaluation of pH data by
EFRPs geochemical consultant, INTERA, Inc., EFRI compared the Mill's groundwater pH data
from Q2 2011 and noted that all of the June 2011 groundwater results, and many of the other
results from Q2 2011, were already outside the revised GWCLs that were to be proposed in the
June 30, 2011 letter. Pursuant to teleconferences with DRC on December 5, and December 19,
2011, EFRI submitted a Work Plan and Schedule on January 20, 2012 and a revised plan based
on DRC comments on April 13, 2012. Based on the approved Work Plan and Time Schedule,
EFRI and DRC entered into a Stipulated Consent Agreement ("SCA") dated July 12, 2012. The
SCA required the completion of the pH Report and the Pyrite Investigation and associated report.
The pH Report and Pyrite Investigation Report were submitted November 9, 2012 and December
7, 2012 respectively. By letter dated April 25, 2013, DRC accepted the conclusions that the out-
of-compliance results for pH are due to background effects within the aquifer matrix and are not
caused by Mill activities. DRC also approved the recalculation of the GWCLs. As a result, the
30-day plan and schedule for assessment is not required for field pH exceedances.
3. A Plan and Time Schedule will not be prepared for monitoring wells with two successive
exceedances in Q3 2014 if successive exceedances were reported in a previous quarter and were
included in the Source Assessment Reports ("SARs"), submitted October 10, 2012, May 8, 2013,
August 30, 2013, December 17, 2013, January 13, 2014, and March 19, 2014. A Plan and Time
Schedule will not be submitted for those constituents covered by the previously mentioned SARs,
because the conclusions and actions delineated in those reports were either accepted by DRC as
documented in DRC correspondence dated April 25, 2013, July 23, 2013, September 17, 2013
January 7, 2014, March 10, 2014, and June 5, 2014 respectively.
4. Chloroform and methylene chloride are the subject of the ongoing chloroform pumping program
and are covered by State of Utah Notice of Violation ("NOV") and Groundwater Corrective
Action Order ("CAO") State of Utah Department of Environmental Quality ("UDEQ") Docket
No. UGW-20-01. As a result, the 30-day plan and schedule for assessment of chloroform and
methylene chloride exceedances is not required.
It is important to note that under the GWDP, GWCLs have been determined on a well-by-well basis to
reflect background groundwater quality, as defined by the mean plus second standard deviation
concentration, or the equivalent. Accordingly, the GWDP requires that constituent concentrations in each
monitoring well shall not exceed the GWCLs set out in Table 2 of the GWDP. It should be noted that,
because the GWCLs have been set at the mean plus second standard deviation, or the equivalent, un-
impacted groundwater would normally be expected to exceed the GWCLs approximately 2.5% of the
time. Therefore, exceedances are expected in approximately 2.5% of all sample results, and do not
necessarily represent impacts to groundwater from Mill operations. In fact, more frequent sampling of a
given analyte will increase the number of exceedances due to statistical variation and not due to Mill
activity. Additionally, given the slow velocity of groundwater movement, accelerated sampling at a
monthly frequency can result in resampling of essentially the same water and can lead to repeat
Letter to Mr. Rusty Lundberg
May 6,2015
Page 3
exceedances for accelerated constituents not due to Mill activities, but due to repeat sampling of the same
water.
1.0 Exceedances in Required Quarterly Sampling Wells
1.1 Quarterly Wells with Two Successive Exceedances
As indicated in the attached Table 1, the analytes discussed below exceeded their respective GWCLs for
two successive sampling periods in Ql 2015. A 30-day plan and schedule contemplated in Part I.G.I c)
of the GWDP will not be required for the consecutive exceedances below for the reasons stated below.
One-time exceedances and non-successive exceedances are noted on Table I, but not listed below.
Consecutive exceedances which occurred in previous reporting periods are discussed in the SARs
submitted to DRC October 10, 2012, May 8, 2013, August 30, 2013, December 17, 2013, January 13,
2014, and March 19, 2014 and the Plan and Time Schedule submitted December 4, 2014.
MW-11
• Manganese concentrations exceeded the GWCL in MW-11 in all of the Ql 2015 sampling events.
This consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the
SAR, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will
become effective upon their publication in the next revision of the GWDP. As a result of DRC's
acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive
exceedance is not necessary and will not be submitted. Until such time as the new GWCLs
become effective, the exceedances will continue to be noted and reported.
MW-14
• Field pH has been slightly outside (slightly lower than) the GWCL for all of the Ql 2015
sampling events. As mentioned above, site-wide pH issues and trends are addressed in reports
submitted on November 9, 2012 and December 7, 2012. As a result of the November 7, 2012
report, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will
become effective upon their publication in the next revision of the GWDP. As a result of DRC's
acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive
exceedance is not necessary and will not be submitted. Until such time as the new GWCLs
become effective, the exceedances will continue to be noted and reported.
MW-25
• Field pH has been slightly outside (slightly lower than) the GWCL for all of the Ql 2015
sampling events. As mentioned above, site-wide pH issues and trends are addressed in reports
submitted on November 9, 2012 and December 7, 2012. As a result of the November 7, 2012
report, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will
become effective upon their publication in the next revision of the GWDP. As a result of DRC's
acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive
exceedance is not necessary and will not be submitted. Until such time as the new GWCLs
become effective, the exceedances will continue to be noted and reported.
• Uranium concentrations exceeded the GWCL in MW-25 in the January and Ql 2015 (February)
sampling events. This consecutive exceedance is addressed in the SAR, dated October 10, 2012.
As a result of the SAR, the GWCLs have been recalculated and accepted by DRC. The
Letter to Mr. Rusty Lundberg
May 6,2015
Page 4
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
MW-26
• Nitrate + nitrite has exceeded its GWCL in the Ql 2015 and March monthly sampling events. As
mentioned above, a CAP has been submitted and approved and the specified actions are currently
being implemented; therefore a plan to address this consecutive exceedance is not necessary and
is not being submitted.
• Chloroform has exceeded its GWCL for all of the Ql 2015 sampling events. MW-26 is used as a
pumping well for the ongoing chloroform capture program and is expected to yield increased
concentrations of chloroform. Because this well is used in the chloroform capture program
which is the subject of separate investigations and actions, a plan and time schedule to address the
consecutive exceedances is not necessary and is not being submitted.
• Methylene chloride has exceeded its GWCL for all of the Ql 2015 sampling events. MW-26 is
used as a pumping well for the ongoing chloroform capture program and is expected to yield
increased concentrations of methylene chloride. Because this well is used in the chloroform
capture program which is the subject of separate investigations and actions, a plan and time
schedule to address the consecutive exceedances is not necessary and is not being submitted.
MW-26 Note: As stated in the September 2009 Statement of Basis (page 23) in support of the January
20, 2010 revisions to the GWDP, "[i]t should be noted that, because MW-26 is a pumping well for
chloroform removal, concentrations of all constituents in that well are subject to potential variation over
time as a result of the pumping activity. This will be taken into account by the Executive Secretary in
determining compliance for this well." Based on information provided by DRC in teleconferences on
April 27, and May 2, 2011, due to the current pumping status as part of the chloroform investigation
program, the 30-day plan and schedule for assessment is not required at this time for exceedances of
chloroform and methylene chloride in MW-26.
• The uranium concentration exceeded its GWCL in Ql 2015 and March monthly sampling events.
This consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the
SAR, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will
become effective upon their publication in the next revision of the GWDP. As a result of DRC's
acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive
exceedance is not necessary and will not be submitted. Until such time as the new GWCLs
become effective, the exceedances will continue to be noted and reported.
• Field pH has been slightly outside (slightly lower than) the GWCL for all of the Ql 2015
sampling events. As mentioned above, site-wide pH issues and trends are addressed in reports
submitted on November 9, 2012 and December 7, 2012. As a result of the November 7, 2012
report, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will
become effective upon their publication in the next revision of the GWDP. As a result of DRC's
acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive
exceedance is not necessary and will not be submitted. Until such time as the new GWCLs
become effective, the exceedances will continue to be noted and reported.
Letter to Mr. Rusty Lundberg
May 6,2015
Page 5
• The chloride concentration exceeded its GWCL in all of the monitoring periods for Ql 2015. As
mentioned above, a CAP has been submitted and approved to address nitrate+nitrite
contamination which is expected to address chloride in groundwater. The actions specified in the
CAP are currently being implemented; therefore a plan to address this consecutive exceedance is
not necessary and is not being submitted.
MW-30
• Nitrate + nitrite has exceeded its GWCL in all of the Ql 2015 sampling events. As mentioned
above, a CAP has been submitted and approved and the specified actions are currently being
implemented; therefore a plan to address this consecutive exceedance is not necessary and is not
being submitted.
• The chloride concentration exceeded its GWCL all of the Ql 2015 sampling events. As
mentioned above, a CAP has been submitted and approved to address nitrate+nitrite
contamination which is expected to address chloride in groundwater. The actions specified in the
CAP are currently being implemented; therefore a plan to address this consecutive exceedance is
not necessary and is not being submitted.
• The selenium concentration exceeded its GWCL in all of the Ql 2015 sampling events. This
consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the SAR,
the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will
become effective upon their publication in the next revision of the GWDP. As a result of DRC's
acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive
exceedance is not necessary and will not be submitted. Until such time as the new GWCLs
become effective, the exceedances will continue to be noted and reported.
MW-31
• Nitrate + nitrite has exceeded its GWCL in all of the Ql 2015 sampling events. As mentioned
above, a CAP has been submitted and approved and the specified actions are currently being
implemented; therefore a plan to address this consecutive exceedance is not necessary and is not
being submitted.
• The chloride concentration exceeded its GWCL in all of the monitoring periods for Ql 2015. As
mentioned above, a CAP has been submitted and approved to address nitrate+nitrite
contamination which is expected to address chloride in groundwater. The actions specified in the
CAP are currently being implemented; therefore a plan to address this consecutive exceedance is
not necessary and is not being submitted.
• The sulfate concentration exceeded its GWCL in all of the monitoring periods for Ql 2015. This
consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the SAR,
the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will
become effective upon their publication in the next revision of the GWDP. As a result of DRC's
acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive
exceedance is not necessary and will not be submitted. Until such time as the new GWCLs
become effective, the exceedances will continue to be noted and reported.
Letter to Mr. Rusty Lundberg
May 6, 2015
Page 6
• The selenium concentration exceeded its GWCL in all of the monitoring periods for Ql 2015.
This consecutive exceedance is addressed in the SAR, dated August 30 2013. As a result of the
SAR, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will
become effective upon their publication in the next revision of the GWDP. As a result of DRC's
acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive
exceedance is not necessary and will not be submitted. Until such time as the new GWCLs
become effective, the exceedances will continue to be noted and reported.
• The Total Dissolved Solids ("TDS") concentration exceeded its GWCL in all of the Ql 2015
sampling events. This consecutive exceedance is addressed in the SAR, dated October 10, 2012.
As a result of the SAR, the GWCLs have been recalculated and accepted by DRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
• Field pH has been slightly outside (slightly lower than) the GWCL for all of the Ql 2015
sampling events. As mentioned above, site-wide pH issues and trends are addressed in reports
submitted on November 9, 2012 and December 7, 2012. However, at the time of the November 9,
2012 and December 7, 2012 reports, the pH in MW-31 was not below the GWCLs. Due to the
additional pH data available a plan and schedule for assessment will be submitted under separate
cover within 30 days of this Exceedance Notice. Additional constituents in MW-31 may be
assessed during the Plan and Time Schedule and SAR. It is important to note EFRI requested
removal of field pH from accelerated monitoring in MW-31 by letter dated February 9, 2015.
DRC approved the removal of these constituents from monthly accelerated monitoring by letter
dated March 25, 2015. The sample results reported concentrations outside of the GWCLs.
MW-35
• The manganese concentration exceeded the GWCL in the January monthly and Ql sampling
events. A plan and schedule to address this exceedance is not necessary and is not being
submitted because the exceedances are based on the interim GWCLs for MW-35, which have
been set at a fraction of the Groundwater Quality Standards. Background has been established
for MW-35 in the Background Report submitted to DRC on May 1, 2014. As a result of the
Background Report, the GWCLs have been calculated and accepted by DRC in a letter dated July
15, 2014. The calculated GWCLs will become effective upon their publication in the next
revision of the GWDP. As a result of DRC's acceptance of the calculated GWCLs, a plan and
schedule to address this consecutive exceedance is not necessary and will not be submitted. Until
such time as the new GWCLs become effective, the exceedances will continue to be noted and
reported. It should be noted that the exceedances of the interim GWCLs noted herein, do not
necessarily represent impacts to groundwater from Mill activities.
• The uranium concentration exceeded the GWCL in MW-35 in all of the Ql 2015 sampling
events. A plan and schedule to address this exceedance is not necessary and is not being
submitted because the exceedances are based on the interim GWCLs for MW-35, which have
been set at a fraction of the Groundwater Quality Standards. Background has been established
for MW-35 in the Background Report submitted to DRC on May 1, 2014. As a result of the
Background Report, the GWCLs have been calculated and accepted by DRC in a letter dated July
Letter to Mr. Rusty Lundberg
May 6, 2015
Page 7
15, 2014. The calculated GWCLs will become effective upon their publication in the next
revision of the GWDP. As a result of DRC's acceptance of the calculated GWCLs, a plan and
schedule to address this consecutive exceedance is not necessary and will not be submitted. Until
such time as the new GWCLs become effective, the exceedances will continue to be noted and
reported. It should be noted that the exceedances of the interim GWCLs noted herein, do not
necessarily represent impacts to groundwater from Mill activities.
• The selenium concentration exceeded the GWCL in MW-35 in the Ql 2015 and March monthly
sampling events. A plan and schedule to address this exceedance is not necessary and is not being
submitted because the exceedances are based on the interim GWCLs for MW-35, which have
been set at a fraction of the Groundwater Quality Standards. Background has been established
for MW-35 in the Background Report submitted to DRC on May 1, 2014. As a result of the
Background Report, the GWCLs have been calculated and accepted by DRC in a letter dated July
15, 2014. The calculated GWCLs will become effective upon their publication in the next
revision of the GWDP. As a result of DRC's acceptance of the calculated GWCLs, a plan and
schedule to address this consecutive exceedance is not necessary and will not be submitted. Until
such time as the new GWCLs become effective, the exceedances will continue to be noted and
reported. It should be noted that the exceedances of the interim GWCLs noted herein, do not
necessarily represent impacts to groundwater from Mill activities.
• The gross alpha minus Rn and U ("gross alpha") concentration exceeded the GWCL in MW-35 in
all of the Ql 2015 sampling events. A plan and schedule to address this exceedance is not
necessary and is not being submitted because the exceedances are based on the interim GWCLs
for MW-35, which have been set at a fraction of the Groundwater Quality Standards.
Background has been established for MW-35 in the Background Report submitted to DRC on
May 1, 2014. As a result of the Background Report, the GWCLs have been calculated and
accepted by DRC in a letter dated July 15, 2014. The calculated GWCLs will become effective
upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the
calculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary
and will not be submitted. Until such time as the new GWCLs become effective, the exceedances
will continue to be noted and reported. It should be noted that the exceedances of the interim
GWCLs noted herein, do not necessarily represent impacts to groundwater from Mill activities.
• Field pH has been slightly outside (slightly lower than) the GWCL in the December 2014 and
January 2015 monthly sampling events. A plan and schedule to address this exceedance is not
necessary and is not being submitted because the exceedances are based on the interim GWCLs
for MW-35, which have been set at a fraction of the Groundwater Quality Standards.
Background has been established for MW-35 in the Background Report submitted to DRC on
May 1, 2014. As a result of the Background Report, the GWCLs have been calculated and
accepted by DRC in a letter dated July 15, 2014. The calculated GWCLs will become effective
upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the
calculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary
and will not be submitted. Until such time as the new GWCLs become effective, the exceedances
will continue to be noted and reported. It should be noted that the exceedances of the interim
GWCLs noted herein, do not necessarily represent impacts to groundwater from Mill activities.
1.2 Quarterly Wells with New Exceedances Reported in Ql
No new exceedances for the quarterly wells were noted during Ql 2015.
Letter to Mr. Rusty Lundberg
May 6,2015
Page 8
2.0 Exceedances in Semiannual Sampling Wells Accelerated to Quarterly
2.1 Semi-annual Wells with Two Successive Exceedances
As indicated in the attached Table 1, the analytes discussed below exceeded their respective GWCLs for
two successive sampling periods (Q4 2014 and Ql 2015).
MW-3
• Fluoride has exceeded the GWCL for both the Q4 2014 sampling event and the Ql 2015
sampling event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012.
As a result of the SAR, the GWCLs have been recalculated and accepted by DRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
• Selenium has exceeded the GWCL for both the Q4 2014 sampling event and the Ql 2015
sampling event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012.
As a result of the SAR, the GWCLs have been recalculated and accepted by DRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
• Field pH has been slightly outside (slightly lower than) the GWCL for both the Q4 2014 sampling
event and the Ql 2015 sampling event. As mentioned above, site-wide pH issues and trends are
addressed in reports submitted on November 9, 2012 and December 7, 2012. As a result of the
November 7, 2012 report, the GWCLs have been recalculated and accepted by DRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
MW-3A
• Field pH has been slightly outside (slightly lower than) the GWCL for both the Q4 2014 sampling
event and the Ql 2015 sampling event. As mentioned above, site-wide pH issues and trends are
addressed in reports submitted on November 9, 2012 and December 7, 2012. As a result of the
November 7, 2012 report, the GWCLs have been recalculated and accepted by DRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
MW-12
• Field pH has been slightly outside (slightly lower than) the GWCL for both the Q4 2014 sampling
event and the Ql 2015sampling event. As mentioned above, site-wide pH issues and trends are
addressed in reports submitted on November 9, 2012 and December 7, 2012. As a result of the
Letter to Mr. Rusty Lundberg
May 6,2015
Page 9
November 7, 2012 report, the GWCLs have been recalculated and accepted by DRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
• Selenium has exceeded the GWCL for both the Q4 2014 sampling event and the Ql 2015
sampling event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012.
As a result of the SAR, the GWCLs have been recalculated and accepted by DRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
MW-15
• Field pH has been slightly outside (slightly lower than) the GWCL for both the Q4 2014 sampling
event and the Ql 2015 sampling event. As mentioned above, site-wide pH issues and trends are
addressed in reports submitted on November 9, 2012 and December 7, 2012. As a result of the
November 7, 2012 report, the GWCLs have been recalculated and accepted by DRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
MW-18
• Thallium has exceeded the GWCL for both the Q4 2014 sampling event and the Ql 2015
sampling event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012.
In the October 10, 2012 SAR, EFRI requested the removal of GWCLs for the far upgradient wells
(MW-1, MW-18, and MW-19) at the Mill which cannot be impacted by Mill activities. In
correspondence dated April 25, 2013, DRC noted "DRC agrees with the justification provided by
EFR, that far upgradient wells are not likely to be impacted by current Mill activities..." and has
recommended the removal of GWCLs for MW-18 from the next revision of the GWDP. A plan
and schedule is not necessary because the exceedance is not caused by Mill activities and was
previously discussed in the October 10, 2012 SAR. Until such time as the GWCLs are removed,
the exceedances will continue to be noted and reported.
MW-19
• Field pH has been slightly outside (slightly lower than) the GWCL for both the Q4 2014 sampling
event and the Ql 2015 sampling event. As mentioned above, site-wide pH issues and trends are
addressed in reports submitted on November 9, 2012 and December 7, 2012. Consecutive
exceedances are also addressed in the SAR, dated October 10, 2012. In the October 10, 2012
SAR, EFRI requested the removal of GWCLs for the far upgradient wells (MW-1, MW-18, and
MW-19) at the Mill which cannot be impacted by Mill activities. In correspondence dated April
25, 2013, DRC noted "DRC agrees with the justification provided by EFR, that far upgradient
wells are not likely to be impacted by current Mill activities..." and has recommended the
removal of GWCLs for MW-18 from the next revision of the GWDP. A plan and schedule is not
necessary because the exceedance is not caused by Mill activities and was previously discussed in
Letter to Mr. Rusty Lundberg
May 6, 2015
Page 10
the October 10, 2012 SAR. Until such time as the GWCLs are removed, the exceedances will
continue to be noted and reported.
• Nitrate + nitrite has exceeded its GWCL in both the Q4 2014 sampling event and the Ql 2015
sampling events. As mentioned above, a CAP has been submitted and approved and the specified
actions are currently being implemented; therefore a plan to address this consecutive exceedance
is not necessary and is not being submitted.
MW-24
• Field pH has been slightly outside (slightly lower than) the GWCL for both the Q4 2014 sampling
event and the Ql 2015sampling event. As mentioned above, site-wide pH issues and trends are
addressed in reports submitted on November 9, 2012 and December 7, 2012. As a result of the
November 7, 2012 report, the GWCLs have been recalculated and accepted by DRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
MW-27
• The chloride concentration exceeded its GWCL for both the Q4 2014 sampling event and the Ql
2015 sampling event and during previous quarters. As mentioned above, a CAP has been
submitted and approved to address nitrate+nitrite contamination which is expected to address
chloride in groundwater. The actions specified in the CAP are currently being implemented;
therefore a plan to address this consecutive exceedance is not necessary and is not being
submitted.
MW-28
• Chloride has exceeded the GWCL for both the Q4 2014 sampling event and the Ql 2015
sampling event and during previous quarters. As mentioned above, a CAP has been submitted and
approved and the specified actions are currently being implemented; therefore a plan to address
this consecutive exceedance is not necessary and is not being submitted.
• Field pH has been slightly outside (slightly lower than) the GWCL for both the Q4 2014 sampling
event and the Ql 2015 sampling event. As mentioned above, site-wide pH issues and trends are
addressed in reports submitted on November 9, 2012 and December 7, 2012. As a result of the
November 7, 2012 report, the GWCLs have been recalculated and accepted by DRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
MW-29
• Field pH has been slightly outside (slightly lower than) the GWCL for both the Q4 2014 sampling
event and the Ql 2015 sampling event. As mentioned above, site-wide pH issues and trends are
addressed in reports submitted on November 9, 2012 and December 7, 2012. As a result of the
November 7, 2012 report, the GWCLs have been recalculated and accepted by DRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
Letter to Mr. Rusty Lundberg
May 6,2015
Page 11
GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
• Field pH has been slightly outside (slightly lower than) the GWCL for both the Q4 2014 sampling
event and the Ql 2015 sampling event. As mentioned above, site-wide pH issues and trends are
addressed in reports submitted on November 9, 2012 and December 7, 2012. As a result of the
November 7, 2012 report, the GWCLs have been recalculated and accepted by DRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
2.1 Semi-annual Wells with New Exceedances Reported in Ql
One new exceedance for the Ql 2015 semi-annual well sampling program is listed below. This
exceedance will result in an accelerated sampling frequency from semi-annually to quarterly. It is
important to note that the well listed below will only be sampled during the first and third quarterly events
for the constituents which exceeded their GWCL. The wells listed below will be sampled for all
constituents listed in the GWDP during the second and fourth quarterly events as that is the regularly
scheduled sampling for the semi-annual wells.
• Chloride in MW-32 was above the GWCL in the Ql sampling event.
Relative to accelerated reporting requirements, based on phone conversations with UDEQ on April 5,
2010, reporting of exceedances is required to be completed within 30 days of receipt of the last data
package for a quarterly monitoring event. Similarly, accelerated monitoring is required to commence the
month following the submission of the Exceedance Notice for a specified quarter for wells that are being
accelerated from quarterly to monthly and the quarter following the submission of the Exceedance Notice
for wells that are being accelerated from semiannually to quarterly. Per teleconferences with UDEQ,
EFRI proposed modified language for the GWDP, Part l.G.l on May 25, 2012, to document DRC
concurrence with the accelerated reporting and monitoring agreements resulting from the April 5, 2012
teleconference.
MW-32
ENERGY FUELS RESOURCES (USA) INC.
Kathy Weinel
Quality Assurance Manager
cc: David Frydenlund
Harold Roberts
David Turk
Dan Hillsten
Scott Bakken
Table 1 - GVVCI, Kxceedances for First Quarter 2015 under the August 24, 2012 GWDP
Ql 2010 Results Q2 2010 Results Q3 2010 Results Q4 2010 Results
Monitoring Well
(Water Class)
Constituent Exceeding
GWCL
GWCL in
August 24,2012
GWDP
Ql 2010 Sample
Date
MW-11 (Class II) Manganese (ug/L)
Ql 2010
Result
Q2 2010
Sample Date
Q2 2010
Result
May 2010
Monthly
Sample Date
May 2010
Monthly
Result
June 2010
Monthly
Sample Date
June 2010
Monthly
Result
July 2010
Monthly
Sample Date
July 2010
Monthly
Result
August 2010
Monthly
Sample Date
August 2010
Monthly Result
Q3 2010
Sample Date
Q3 2010
Result
October 2010
Monthly Sample
Date
October 2010
Monthly
Result
Q4 2010
Sample Date
Q4 2010
Result
Required Quarterly Sampling Wells
7/20/2010 141 133
December 2010
Monthly Sample
Date
December 2010
Monthly Result
MW-14 (Class III) Field pH (S.U.) 6.5 - 8.5 6.45 6.29 6.45 8/25/2010 6.48 9/8/2010 6.51 10/20/2010 11/10/2010 6.37 12/15/2010
Field pH (S.l'.l 7.2 6.36
MW-25 (Class III) Cadmium (ug/L) 1.5 2/3/2010 4/28/2010 NS NS
Uranium (ug/L) 5.93 NA
Nitrate + Nitrite (as N)
(mg/L) 0.62 1.3 0.6 0.7
Uranium (ug/L) 58.7 71.8 72.7
Chloroform (ug/l.) 1700 800
Chloride (mg/L) 58.31
MW-26 (Class III) Carbon Tetraehloride
(ug/L)
4/22/2010 5/21/2010 NA
Field pH (S.U.) 6.59 6.36 6.45 6.60 6.61 6.49
Dichloromcthanc
(Methylene Chloride)
(ug/L)
9.9 2.2 12
Nitrate + Nitrite (as N)
(mg/L) 2.5 15.8 7/21/2010
Chloride (mg/L) 128
Uranium (ug/L) 8.32 6.82 NS
MW-30 (Class II) 6/15/2010
Field pH (S.U.) 6.50 6.81 6.62 7.47 7/21/2010
7/27/2010 6.80 (6.82) 8/24/2010 6.73
9/14/2010
9/21/2010
6.64
6.80(6.84) 6.77 6.75
Ammonia (mg/l.) <0.05 <0.()5 NS NS
Selenium (ug/L) 35.3 7/27/2010 8/24/2010 12.6
Nitrate + Nitrite (as N)
(mg/L) 21.7 22.5 6/15/2010 21.1 7/21/2010 20 8/24/2010 22 21 20 20
TDS (mg/l.)
MW-31 (Class I Chloride (mg/L.) 2/9/2010 4/20/2010 NS
Selenium (ug/L.) 71
9/13/2010
(9/21/10) NS 11/9/2010
Field pH (S.U.) 7.38 5/21/2010 7.66 (7.13)
Sulfate (mg/L.) NS 527 NS
12/14/2010
Manganese (ug/L) 200 698
Thallium (ug/l) 0.5 1.14
MW-35 (Class II)
(iross Alpha minus Rn &
U (pCi/I.) NS NS NS NS NS 11/30/2010 2.6
Field pH (S.U.) 6.5 - 8.5
Selenium (ug/L) 12.5
Uranium (ug/l.) 7.5
289
Required Semi-Annual Sampling Wells
MW-01 (Class II)
Manganese (ug/l.]
Tetrahydrofuran (ug/L)
Field pH (S.U.)
Sulfate (mg/l.)
6.77 - 8.5
838
7.86 (6.87) 6.96
Selenium (ug/l.) 38.8
Field pH (S.U.) 6.5 - 8.5 6.14 (6.25) 6.35
MW-03 (Class I Sulfate (mg/l.) NS
Nitrate + Nitrite (as N)
(mg/1.) 0.73
Fluoride (Mg/L) 0.63
Field pH (S.U.) 6.23 (6.24) 6.21
MW-3A (Class III)
Sulfate (mg/L) 3680
Nitrate + Nitrite (as N)
(mg/L) 1.3 NA 1.2
TPS (mg/L) 5805
Selenium (ug/L) 89 94.8
MW-05 (Class II) Uranium (ug/I.) 7.5
MW-12 (Class I
Selenium (ug/L) 25 4/27/2010 NS 9/20/2010 31.9 11/19/2010 27.6
Field pH (S.U.) 6.62
MW-15(ClassI Selenium (ug/L)
Field pH (S.U.) 6.62 - 8.5
NS NS NS NS NS
Ql 2010 Results Q2 2010 Results Q3 2010 Results Q4 2010 Results
Monitoring Well
(Water Class)
Constituent Exceeding
GWCL
GWCL in
Current GWDP Ql Sample Date Ql Result Q2 Sample
Date Q2 Result May Monthly
Sample Date
May
Monthly
Result
June Monthly
Sample Date
June Monthly
Result
July Monthly
Sample Date
July Monthly
Result
August
Monthly
Sample Date
August Monthly
Result
Q3 Sample
Date Q3 Result
October
Monthly Sample
Date
October
Monthly
Result
Q4 Sample
Date Q4 Result
December
Monthly Sample
Date
December
Monthly Result
MW-18 (Class 111)
Thallium (uc/1)
Sulfate (mg/L)
Field pH (S.U.)
TDS (mg/L)
1938.9
6.25-8.5
3.73
Required Semi-Annual Sampling Wells, continued
NA NA
NS NS
Field pH (S.U.) 6.61 (6.66)
MW-19 (Class III) Gross Alpha minus Rn &
V (pCi/L) 2.36 NS 9/15/2010
Nitrate + Nitrite (as N)
(mg/L)
MW-23 (Class III) Held pH (S.U.) 6.18
Cadmium (ug/l.) 2.5 4.28
MW-24 (Class III) Fluoride (mg/I.)
Sulfate (mg/l,) 2903 NS NS 9/21/2010
Thallium (ug/L) 1.3 1.57 1.09
Field pH (S.U.) 6.5 - 8.5 5.91(5.78)
Nitrate + Nitrite (as N)
(mg/l.) 5.8
MW-27 (Class I
Chloride (mg/l.) NA 42
Sulfate (mg/L) NS NS NS 9/14/2010 11/12/2010
TDS (mg/L) 1075 1160
Gross Alpha minus Rn &
U (pCi/L) 2.4
Chloride (mg/l.j 105 108
Cadmium (ug/L)
MW-28 (Class III) Uranium (ug/I.) 4.9 NS
Vanadium (ug/I.)
Field pH (S.U.) 5.67 5.91 5.72
TDS (mg/I.)
MW-29 (Class III)
Field pH (S.U.) 6.82 NS
6.17
Gross Alpha minus Rn &
U (pCi/L) 3.33 4.5 2.9
MW-32 (Class III) Chloride (mg/I.) 35.39 4/20/2010 NS
Field pH (S.U.) 6.4 - 8.5 6.03
GWCL values are taken from August 24, 2012 version of GWDP.
NS = Not Required and Not Sampled
— i\equwcu auu
Hxeeedanees are shown in yellow
Values in () parentheses are the field pH measurements for the resampied analyses.
Table 1 - GWCL Exceedances fur First Quarter 2015 under the August 24, 2012 GWDP
Ql 2011 Results 02 2011 Results Q3 2011 Results 04 2011 Results
Monitoring
Well (Water
Class)
Constituent Exceeding
GWCL
GWCL in
August 24,
2012 GWDP
January 2011
Monthly
Sample Date
January 2011
Monthly Sample
Result
Ql 2011
Sample
Date
Ql 2011
Result
March 2011
Monthly
Sample Date
March
2011
Monthly
Result
Q2 201I
Sample
Date
Q2 2011
Result
May 2011
Monthly
Sample Date
May 2011
Monthly
Result
June 2011
Monthly
Sample Date
June 2011
Monthly
Result
July 2011
Monthly
Sample Date
July 2011
Monthly
Result
Q3 2011
Sample
Date
Q3 2011
Result
September
2011
Monthly
Sample Date
September
2011 Monthly
Result
Q4 2011
Sample Date
Q4 2011
Result
. NoTember
2011 Monthly
Sample Date
November
2011 Monthly
Result
December
2011 Monthly
Sample Date
Required Quarterly Sampling Wells
MW-11
(Class II) Manganese (ug/L) 170 6/15/2011 21
MW-14
(Class III) Field pH (S.U.) 6.5 - 8.5 6.37 6.22 6.37 5.83 6.4 6.23
(6.41) 6.71 (6.82) 11/9/2011 12/12/2011
MW-25
(Class III)
Field pH (S.U.)
Cadmium (ug/L) 1.5 2/2/2011 3/15/2011 4/4/2011 5/11/2011 6/20/2011 7/6/2011
8/3/2011
8/30/11
6.42
(6.54) 9/7/2011 10/4/2011 11/9/2011 12/12/2011
Uranium (ug/I.) 6.5 7.02 6.8 6.72 7.06 6.74 6.37 5.27
Nitrate + Nitrite (as N)
(mg/L) 0.62 0.8 0.9 2.4 0.9 1.3
Uranium (ug/I.) 56.1 58.9 55.6
Chloroform (ug/I.) 70 1200 390 1900 730 300
Chloride (mg/L) 58.31 59 64 60 66
MW-26
(Class III) Carbon Tetrachloride
(ug/L) <1.0 6/20/201 1 7/6/2011 <1.0
8/3/2011
8/30/11
Field pH (S.U.) 6.07
(6.58)
Diehloromethane
(Methylene Chloride)
(ug/L)
10 20 10 7.9 8.9
Nitrate + Nitrite (as N)
(mg/L) 2.5
Chloride (mg/L) 145
MW-30
(Class II)
Uranium (ug/L) 8.32
Field pH (S.U.) 6.50 6.65 6.S3 5.66
10/4/2011
11/29/2011 6.96 (6.73) 5.8!
Ammonia (mg/L) 0.14 <0.05 <0.05 <0.05
Selenium (ug/L) 34 34.7 34 44.4 38.3 38.7 39.7 32.4 36.8
Nitrate + Nitrite (as N)
(mg/L) 19 21 22 21 20 22 22 20 21 21 21
MW-31
(Class III)
TDS (mg/L)
Chloride (mg/L; 143 NS 2/1/2011 5/10/2011 6/20/2011 145 148 8/2/2011 148 9/6/2011 148 10/3/2011
Selenium (ug/L)
11/8/2011
(11/29/12) 12/12/2011
NS
Field pH (S.U.) 6.73 7.01 (7.34)
Sulfate (mg/l.) 532 NS 538 537 541 539 552
Manganese (ug/L) 248 270 283
Thallium (ug/l) 0.5 0.52 0.57
MW-35
(Class II)
Gross Alpha minus Rn
& I ipfi/l i 3.75 NS 2/15/2011 2.6 NS 6/7/2011 3.7 NS 7/20/11 8/30/2011 11/8/2011 12/14/11
Field pH (S.U.I 6.5 - 8.5 6.49 6.40 6.47 6.51
Selenium (ug/L; 12.5
Uranium (ug/I.) 7.5 21.7 NA NA 18.3 22.3 20.1
Required Semi-Annual Sampling Wells
MW-01
(Class II)
Manganese (ug/L)
Tetrahydrofuran (ug/I.
Field pH (S.U.)
Sulfate (mg/L)
289
6.77 - 8.5 7.06
17.67)
NA NA
7.08 (7.51)
Selenium (ug/L) 40.5
MW-03
(Class III)
Field pH (S.U.) 6.53 (6.83
Sulfate (mg/L) 3663 3060 3470
Nitrate + Nitrite (as N)
(mg/I.) 0.73
Fluoride (Mg/L)
Field pH (S.U.) 6.5 (6.92)
MW-03A
(Class III)
Sulfate (mg/I.) 3750
Nitrate + Nitrite (as N)
(mg/I.) 1.3
TDS (mg/L) 5805 5«/0
Selenium (ug/I.) 89 99 95
MW-05
(Class II) Uranium (ug/L) 7.5 29.5
MW-12
(Class III)
Selenium (ug/I.; 25 2/15/201 39.0 4/5/2011 8/9/201 25.4 35.4
Field pH(S.U.) 6.7 (6.97)
MW-15
(Class III)
Selenium (ug/l.) I 12
Field pH (S.U.) 6.62 - 8.5
Ql 2011 Results Q2 2011 Results Q3 2011 Results Q4 2011 Results
Monitoring
Well i Water
Class)
Constituent Exceeding
GWCL
GWCL in
Current
GWDP
January 2011
Monthly
Sample Date
January 2011
Monthly Sample
Result
Ql 2011
Sample
Date
Ql 2011
Result
March 2011
Monthly
Sample Date
March
2011
Monthly
Result
Q2 2011
Sample
Date
02 2011
Result
May 2011
Monthly
Sample Date
May 2011
Monthly
Result
June 2011
Monthly
Sample Date
June 2011
Monthly
Result
July 2011
Monthly
Sample Date
July 2011
Monthly
Result
Q3 2011
Sample
Date
Q3 2011
Result
September
2011
Monthly
Sample Date
September
2011 Monthly
Result
Q4 2011
Sample Date
Q42011
Result
November
2011 Monthly
Sample Date
November
2011 Monthly
Result
December
2011 Monthly
Sample Date
December
2011
Monthly
Result
Required Semi-Annual Sampling Wells, continued
MW-18
(Class III)
Thallium (ug/l)
Sulfate (mg/L)
Field pH (S.U.)
TDS (mg/I.)
1.95 3.49
3250
4/6/2011
3.74
1780
NA
NA
NA NS
NA
8/10/2011
9/21/11
4.0 3.39
5.95
(6.30) 6.55 (6.63)
3220
Field pH (S.U.) 6.88 (7.02)
MW-19
(Class III) Gross Alpha minus Rn
& U (pCi/L) 2.36 2/21/2011 NS NS NS 10/12/2011
Nitrate + Nitrite (as N)
(mg/l.)
MW-23
(Class III) Field pH (S.U.) 6.5 - 8.5 10/6/201 6.56 (6.77)
Cadmium (ug/I.; 2.5 2.78 2.61 1.78
MW-24
(Class III)
Fluoride (mg/I.)
Sulfate (mg/L) 2903 4/5/2011 NS 10/11/201 2500
Thallium (ug/L) 1.42 1.07
Field pH (S.U.) 6.5 - 8.5 5.73 6.12 6.45 6.44
Nitrate + Nitrite (as N)
(mg/L)
MW-27
(Class III)
Chloride (mg/L) 38 46 43 43
Sulfate (mg/L) NS NS NS 10/5/2011
TDS (mg/L) 1075 1090 1190 1090 1110
Gross Alpha minus Rn
& U (pCi/L)
NS
Chloride (mg/L) 109 105
Cadmium (ug/L)
MW-28
(Class III)
Uranium (ug/L) 2/14/2011 4/11/2011 3.29 NS NS NS 8/8/2011 10/5/2011
Vanadium (ug/L) 30
Field pH (S.U.) 6.1-8.5 5.69 5.78 (5.07(6.11)
MW-29
(Class III)
TDS (mg/L)
Field pH (S.U.) NS
4/18/2011 NS 8/9/2011 10/5/2011
MW-32
(Class III)
Gross Alpha minus Rn
& U (pCi/L) 3.33 1.5 4.6 3.7
Chloride (mg/l.) 35.39 NS 8/2/2011
8/30/11 10/3/2011 NS
Field pH (S.U.) 6.4 - 8.5 5.99 6.14 6.10 6.35
NS
NA
Notes:
GWCL values are taken from August 24.
version of (1WDP.
NS = Not Required and Not Sampled
Fxeeedanees are shown in yellow
Values in () parentheses are the field pH measurements for the resampled analyses.
Table I - GWCL Exceedances for First Quarter 21)15 under the August 24, 2012 GWDP
Ql 2012 Results Q2 2012 Results Q3 2012 Results Q4 2012 Results
Monitoring Well
(Water Class)
Constituent
Exceeding GWCL
GWCL in
August 24,
2012 GWDP
January 2012
Monthly
Sample Date
January 2012
Monthly
Result
Ql 2012
Sample Date
Ql 2012
Result
March 2012
Monthly
Sample Date
March
2012
Monthly
Result
April 2012
Monthly
Sample Date
April 2012
Monthly
Result
Q2 2012
Sample
Date
Q2 2012
Result
June 2012
Monthly
Sample
Date
June 2012
Monthly
Result
Q3 2012
Sample
Date
Q3 2012
Result
August
2012
Monthly
Sample
Date
August
2012
Monthly
Result
September
2012
Monthly
Sample
Date
September
2012
Monthly
Result
October
2012
Monthly
Sample Date
October
2012
Monthly
Result
Q4 2012
Sample Date
Q4 20I2
Result
December
2012
Monthly
Sample Date
Required Quarterly Sampling Wells
MW-11 (Class II) Manganese (ug/L) 2/13/2012 5/8/2012 127 161 138
MW-14 (Class III) Field pH (S.U.) 6.5 - 8.5 6.36 7.08 10/23/2012 11/27/2012 6.52
Field pH (S.U.) 6.5 - 8.5 6.63 6.83 6.73 6.47
MW-25 (Class III) Cadmium (ug/L) 1.5 1/25/2012 3/14/2012 4/9/2012 5/2/2012 6/18/2012 7/10/2012 8/6/2012 9/18/2012 1.56 12/24/2012
Uranium (ug/l.) 6.6 6.93 6.52 6.4^ 6.72
Nitrate + Nitrite (as
N) (mg/L) 0.62 1.9 1.2 3.4 2.9 2.3 7/11/2012 1.9 1.8
Uranium (ug/L) 64.9 56.8
Chloroform (ug/I.) 1900 3300 2900 2900 1700 2400 8/16/2012 970
Chloride (mg/L) 58.31 82 85 78 78 2.62
MW-26 (Class III) Carbon Tetrachloride
(ug/L)
1/25/2012 3/14/2012 4/11/2012 5/7/2012
6/26/2012 <1.0 6/19/2012 <1.0 8/16/2012 <1.0 12/24/2012
Field pH (S.U.) 6.74 - 8.5
2/15/2012
2/21/2012
3/8/2012
6.72 (6.91)
(6.71) 7.00 (7.01; 7/11/2012
8/16/2012
7.10
(6.80) 6.63 6.60
Dichloromelhanc
(Methylene Chloride)
(ug/L)
13 24 27 20 10
Nitrate + Nitrite (as
N) (mg/L) 1/24/2012 17 18
Chloride (mg/I.) 128 139 130 135
Uranium (ug/I.; 8.38 7.84
MW-30 (Class II) 11/13/2012 12/26/2012
Field pH (S.U.) 1/24/2012 6.95
Ammonia (mg/I.) NS
Selenium (ug/I.) 1/24/2012 33.3 35 39.5 39.1 37
Nitrate + Nitrite (as
N) (mg/l.) 21 21 20 21.6 21 21
TDS (mg/L) 1320 1460
MW-31 (Class III) Chloride (mg/L) 150 3/13/2012 152 4/9/2012 160 5/2/2012 151
Selenium (ug/L)
6/18/2012
6/29/2012 138 7/9/2012
NA 76.9
Field pH (S.U.) 7.13 7.19 7.28 (7.63) 7.53
Sulfate (mg/L) 539 538 517 497 529
Manganese (ug/L) 200 304 273 283 253 241
Thallium (ug/l) 0.65 0.59 0.57 0.61 0.54
MW-35 (Class I
Gross Alpha minus
Rn & U (pCi/L) 4.1 3/13/2012 6.2 4.1 4.5 4.9 7/10/2012
Field pH (S.U.) 6.35 6.48
Selenium (ug/I.) 12.5 15.9 18.8 19.0
Uranium (ug/L) 16.1 22.2 22.5 24.5 26.2 22.9 22.4
Required Semi-Annual Sampling Wells
fetrahydrofuran (ug/L
MW-01 (Class II)
Manganese (ug/L)
Field pH (S.U.)
Sulfate (mg/l.)
11.5
NS
NA
NA 176
21.8
846
Selenium (ug/I.) 51.1
Field pH (S.U.) 6.5 - 8.5 6.55
MW-03 (Class III) Sulfate (mg/I.) NS
Nitrate + Nitrite (as
N) (mg/I.) NA
Fluoride (Ma/I.) 0.86 1.04 1.26
Field pH (S.U.) 6.5 - 8.5 6.35
MW-03A (Class Sulfate (mg/l.) 3640
Nitrate + Nitrite (as
N) (mg/L)
NS NS 5/15/2012
TDS (mg/l.)
Selenium (ug/L) 99.3
MW-05 (Class II) Uranium (ug/L) 7.5 NS
MW-12 (Class III)
Selenium (ug/I.) 2/29/2012 7/17/2012 23.0
Field pH (S.U.) 6.5 - 8.5
MW-15 (Class III) Selenium (ug/I.)
Field pH (S.U.)
2/22/201 NS NS 11/14/2012 NS
— 1— Ql 2012 Results Q2 2012 Results Q3 2012 Results Q4 2012 Results
Monitoring Well
(Water Class)
Constituent
Exceeding GWCL
GWCL in
Current
GWDP
January 2012
Monthly
Sample Date
January 2012
Monthly
Result
Ql 2012
Sample Date
Ql 2012
Result
March 2012
Monthly
Sample Date
March
2012
Monthly
Result
April 2012
Monthly
Sample Date
April 2012
Monthly
Result
Q2 2012
Sample
Date
Q2 2012
Result
June 2012
Monthly
Sample
Date
June 2012
Monthly
Result
Q3 2012
Sample
Date
Q3 2012
Result
August
2012
Monthly
Sample
Date
August
2012
Monthly
Result
September
2012
Monthly
Sample
Date
September
2012
Monthly
Result
October
2012
Monthly
Sample Date
October
2012
Monthly
Result
Q4 2012
Sample Date
Q4 2012
Result
December
2012
Monthly
Sample Date
December
2012
Monthly
Result
Required Semi-Annual Sampling Wells, continued
MW-18 (Class III)
Thallium (ug/l)
Sulfate (mg/L)
Held pH (S.U.)
TDS (mg/L) 3198.77 3230
3.S1
3280 3220
11/26/2012
3160
NS
NA
Field pH (S.U.)
MW-19 (Class III) (iross Alpha minus
Rn & U (pCi/I.) 2.36 NS
Nitrate + Nitrite (as
N) (mg/l.) 2.83 3.9 3.7 3.96
MW-23 (Class III) Field pH (S.U.) 6.5 - 8.5
Cadmium (ug/I.) 2.5 2.25 2.01
MW-24 (Class III) Fluoride (mg/I.) 0.36 0.55*
Sulfate (mg/I.) NS NS 7/18/2012
Thallium (ug/l.) 1.36
Held pll IS.1M 6.03 6.21
Nitrate + Nitrite (as
N)(mg/1.) 6.9
MW-27 (Class III)
Chloride (mg/I.) *8 46 47
Sulfate (mg/L) 2/28/2012 NS 5/1/2012 NS
TDS (mg/L) 1075
Gross Alpha minus
Rn & U (pCi/L) 2.3
010)2012 Chloride (mg/L)
Cadmium (ug/L) 5.2 4.37
MW-28 (Class III) Uranium (ug/I.) NS
Vanadium (ug/I.) 30 <15.0
Field pH (S.U.) 6.1-8.5 7/16/2012
8/1/2012
6.38
(1311
TDS (mg/L) 4600 4430
MW-29 (Class III) Field pH (S.U.) 7/16/2012
8/1/2012
6.68
(6.45)
Gross Alpha minus
Rn & U (pCi/L) 3.33
MW-32 (Class III) Chloride (mg/L) NS 2/21/2012 NS
Field pH (S.U.) 6.4 - 8.5 6.40 6.72
Notes:
GWCL values are taken from August 24. 2012 version of
GWDP.
NS = Not Required and Not Sampled
— isequueu tuiu
Exceedances are shown in yellow
Values in () parentheses are the field pH measurements for the resampled analyses.
Table 1 - GWCL Exceedances for First Quarter 2015 under the August 24, 2012 GWDP
Ql 2013 Results 02 2013 Results Q3 2013 Results Q4 2013 Results
Monitoring
Well (Water
Class)
Constituent Exceeding
GWCL
GWCL in August 24
2012 GWDP
January 2013
Monthly Sample
Date
January
2013
Monthly
Result
Ql2013
Sample
Date
Ql 2013
Result
March
2013
Monthly
Sample
Date
March 2013
Monthly
April 2013
Monthly
Sample Date
April 2013
Monthly
Result
Q2 2013
Sample
Date
Q2 2013
Result
June 2013
Monthly
Sample
Date
June 2013
Monthly
Result
Q3 2013
Sample
Date
Q3 2013
Result
August 2013
Monthly
Sample
Date
August
2013
Monthly
Result
September
2013
Monthly
Sample
Date
September
2013 Monthly
Result
October
2013
Monthly
Sample Date
October
2013
Monthly
Result
Q4 2013
Sample Date
Q4 2013
Result
December
2013 Monthly
Sample Date
December
2013 Monthly
Result
Required Quarterly Sampling Wells
MW-11 (Class
II) Manganese (ug/L) 131.29 1/23/2013 2/211/2(113 139 3/20/2013 4/16/2013 5/14/2013 144 6/25/2013 /52
MW-14 (Class
III) Field pH (S.U.) 6.47 6.48 6.77 11/20/2013 6.51 12/18/2013
MW-25 (Class
III)
Field pH (S.U.) 6.5 - 8.5 6.65 6.62 7.0(1
Cadmium (ug/l.) 3/19/2013 4/17/2013 5/14/2013 6/24/201 ) 7/10/2013 8/19/2013 1.57 9/17/2013 11/19/2013
Uranium (ug/L) 5.94
Nitrate + Nitrite (as N)
(mg/L) 2.01 3.04 2.11* 1.98 1.77 3.60 4.10 1.38
Uranium (ug/l.) 58.8 75.8
Chloroform (ug/I.) 70 1270 1500 1340 1680 1210 4030* 2410
Chloride (mg/L) 63.1 87.8 77.9* 72.1 70.8 63.8
MW-26 (Class
III) Carbon Tetrachloride
(ug/L)
1/24/2013 2/20/2013 3.15 3/20/2013 4/17/2013 5/23/2013 <1.0
6/5/2013
6/25/2013 <1.0 7/11/2013 <1.0 8/20/2013
Field pH (S.U.) 6.71
Diehloromethane
(Methylene Chloride)
(ug/l.)
6.49 5.53 8.31 10.2 52.4*
[12.1] 14.2
Nitrate + Nitrite (as N)
(mg/I.) 2.5 19.2 21.4 14.3 16.8 18.8
Chloride (mg/I.) 130 131 128
MW-30 (Class
II)
Uranium (ug/I.) 8.32 8.36 7.08 7.48 7.07
Field pH(S.U.) 6.50 6.78 6.96
Ammonia (mg/I.) 0.14
Selenium (ug/I.) 34 37.2 42.3 39 37.3 39.4 36.5
Nitrate + Nitrite (as N)
(mg/l.) 22.8 19.3 18.8 23.8 20.0 21.7 16.0
MW-31 (Class
III)
TDS (mg/I.) 1500 1460
Chloride (mg/L) 143 1/22/2013 176 3/19/2013 168 171 5/13/2013 169 8/19/2013 9/17/2013
Selenium (ug/L) 73.7 73.2 72.6 80.7 74.5
Field pH (S.U.) 6.37 7.92
Sulfate (mg/L) 532 644 611 668 630 659 659
Manganese (ug/L) 243 250 262 257 240 251
Thallium (ug/l) 0.715 0.946 <0.5
MW-35 (Class
II)
Gross Alpha minus Rn &
U (pCi/L) 3.75 1/23/2013 6.62 2/26/2013 5.09 9.51 4.75 4.92 3.24 7/9/2013 5.70 3.92 10/23/2013 3.73
Field pH (S.U.) 6.5 - 8.5 6.83 6.52
Selenium (ug/L) 13.6 19.8
Uranium (ug/L) 23.6 22.0 19.3 23.0 21.4 20.2 21.8 24.1
Required Semi-Annual Sampling Wells
MW-01 (Class
Manganese (ug/L)
Tetrahydrofuran (ug/L)
Field pH (S.U.)
Sulfate (mg/l.)
6.77 - 8.5
27
3.26
930
Selenium (ug/I.) 52.0
MW-03 (Class
III)
Field pH (S.U.)
Sulfate (mg/I.) 3663
Nitrate + Nitrite (as N)
(mg/l.) 0.73
Fluoride (Mg/I.) 0.902 0.994
Field pH (S.U.)
MW-03A (Clas:
III)
Sulfate (mg/L)
Nitrate + Nitrite (as N)
(mg/L) 1.3 NS 5/23/2013
TDS (mg/L) 5805 5750 6020 5860
Selenium (ug/L.)
MW-05 (Class
11) Uranium (ug/L) 36 20.1
MW-12 (Class Selenium (ug/I.) 25 3/6/2013 NS 7/17/2013 NA
Field pH (S.U.)
MW-15 (Class
III)
Selenium (ug/L)
Field pH (S.U.) 6.62 - 8.5
NS NS 1/20/2013
Ql 2013 Results Q2 2013 Results Q3 2013 Results Q4 2013 Results
Monitoring
Well (Water
Class)
Constituent Exceeding
GWCL
GWCL in Current
GWDP
January 2013
Monthly Sample
Date
January
2013
Monthly
Result
Ql 2013
Sample
Date
Ql 2013
Result
March
2013
Monthly
Sample
Date
March 2013
Monthly
Result
April 2013
Monthly
Sample Date
April 2013
Monthly
Result
Q2 2013
Sample
Date
Q2 2013
Result
June 2013
Monthly
Sample
Date
June 2013
Monthly
Result
Q3 2013
Sample
Date
Q3 2013
Result
August 2013
Monthly
Sample
Date
August
2013
Monthly
Result
September
2013
Monthly
Sample
Date
September
2013 Monthly
Result
October
2013
Monthly
Sample Date
October
2013
Monthly
Result
Q4 2013
Sample Date
Q4 2013
Result
December
2013 Monthly
Sample Date
December
2013 Monthly
Result
Required Semi-Annual Sampling Wells, continued
MW-18 (Class
III)
Thallium (ug/l)
Sulfate (mg/I.)
Field pH (S.U.)
TDS (mg/L)
1938.9
6.25-8.5 NA 2/25/2013
3.26 NA 2.81
I860
3.32 NA 3.06
3240
Field pH (S.U.) 6.58
MW-19 (Class
mi Gross Alpha minus Rn &
U (pCi/L) 2.36 NS 3/13/2013 NS NS 5/20/2013 NS 7/15/2013 NS
Nitrate + Nitrite (as N)
(mg/L) 3.70
MW-23 (Class
III) Field pH (S.U.) 6.5 - 8.5 6.37 NS NS
Cadmium (ug/L) 2.5 6.72 1.15
MW-24 (Class
III)
Fluoride (mg/L)
Sulfate (mg/l.) 2903 NS 3/13/2013 5/22/2(11 1 2070 NS 7/19/2013 12/12/2013 2490
Thallium (ug/L) 1.64
Field pHlS.U.) 6.5 - 8.5 6.29 5.80 NA 6.08
Nitrate + Nitrite (as N)
(mg/L) 5.6 7.94
MW-27 (Class
III)
Chloride (mg/L) 44.3 44.2 45.0
Sulfate (mg/L) NS 2/25/2013 NS NS NS NS
TDS (mg/L) 1075 1140 1110 1110 1100
Gross Alpha minus Rn &.
U (pCi/l.)
Chloride (mg/l.) 105 110
Cadmium (ug/L)
MW-28 (Class
III)
Uranium (ug/l.) NS 3/5/2013 NS 5/15/2013 7/17/2013 NS
Vanadium (ug/I.)
Field pH (S.U.) 5.97 6.10
MW-29 (Class
HI)
TDS (mg/L)
Field pH (S.U.) NS 3/6/2013 5/23/2013 NS 7/17/2013
MW-32 (Class
III)
(iross Alpha minus Rn &
U (pCi/L) 3.33 5.02 3.72 6.46
Chloride (mg/L) 35.39 NS NS 11/18/2013
Field pH (S.U.) 6.4 - 8.5 6.39 6.29
GWCL values are taken from August 24. 2012 version of GWDP.
NS = Not Required and Not Sampled
isi\ — ivcquncu
Exceedances are shown in yellow
Values in () parentheses are the field pH measurements for the resampled analyses.
Table I - GWCL Kxceedances for First Quarter 2015 under the August 24, 2012 GWDP
Ql 2014 Results Q2 2014 Results Q3 2014 Results Q4 2014 Results
Monitoring
Well (Water
Class)
Constituent Exceeding
GWCL
GWCL in August
24,2012 GWDP
January 2014
Monthly Sample
Date
January
2014
Monthly
Result
February
2014
Monthly
Sample Date
February
2014
Monthly
Result
Ql2014
Sample
Date
Ql 2014
Result
April 2014
Monthly
Sample
Date
April 2014
Monthly
Result
May 2014
Monthly
Sample
Date
May 2014
Monthly
Result
Q2 2014
Sample
Date
Q2 2014
Result
July 2014
Monthly
Sample
Date
July 2014
Monthly
Result
August
2014
Monthly
Sample
Date
August
2014
Monthly
Result
Q3 2014
Sample
Date
Q3 2014
Result
October
2014
Monthly
Sample
Date
October
2014
Monthly
Result
Q4 2014
Sample Date
Q4 2014
Result
December
2014 Monthly
Sample Date
December
2014 Monthly
Result
Required Quarterly Sampling Wells
MW-11 (Class
II) Manganese (ug/L) 131.29 141 163 134 4/25/2014 5/14/2014 128 673/2014 1S7
MW-14 (Class
III) Field pH (S.U.) 6.5 - 8.5 1/8/2014 2/24/2014 6.44 6.41 6.46 6.25
MW-25 (Class
III)
Field pH (S.U.) 6.5 - 8.5 6.37 6.10 6.27 7.18
Cadmium (ug/L) 1.5 1.29 6/2/2014 7/28/2014 8/18/2014 9/3/2014 10/6/2014 1.57 12/9/2014
Uranium (ug/I.) 10.6 7.43 5.9
Nitrate + Nitrite (as N)
(mg/L) 0,62 1.64 1.42 2.0 1.00 1.10 0.704 1.09
Uranium (ug/l. 41.8 81.7 48.4 75.4 66.0
Chloroform (ug/L) 2800 1310 1580 1450 2330
Chloride (mg/L) 58.31 61.0 80.0 59.0 68.0
MW-26 (Class
III) Carbon Tetrachloride
(ug/L) 6.86 5/14/2014 7/29/2014 12/10/14
12/15/14
Field pH (S.U.) 6.74 - 8.5 6.67 6.09
Dichloromethane
(Methylene Chloride)
(ug/L)
/5.5 5.54 10.2 6.73 9.6 43.3 3.78
Nitrate + Nitrite (as N)
(mg/l.) 20.3 18.4 21.3 18.3 17.9 19.4
Chloride (mg/I.) 128 139 136 136 154
MW-30 (Class
II)
Uranium (ug/I.) 9.82
1/8/2014 2/25/2014 3/11/2014 4/23/2014
Field pH (S.U.) 6.76 7.51 6.82 6.92
Ammonia (mg/I.)
Selenium (ug/L) 35.6 35.8 38.0 37.0 35.4 42.9
Nitrate + Nitrite (as N)
(mg/L) 23.3 23.1 19.0 15.2 18.9
TDS (mg/L) 1320 1510 1460 1420 1520
MW-31 (Class Chloride (mg/L) 230 230 200 173 7/28/2014 8/18/2014 12/9/2014
Selenium (ug/L) 77.9 82.8 81.5 78.9 73.0
Field pH (S.U.) 6.5 - 8.5 6.45 8.23
Sulfate (mg/L) 5J« 681 639
Manganese (ug/L) 202 228 222
Thallium (ug/l) 0.6
MW-35 (Class
II)
Gross Alpha minus Rn &
U (pCi/L) 4.12 3.98 3.36 7/29/2014 8/20/2014
Field pH (S.U.)
Selenium (uti/I.) 13.9 13.2 28.9 31.4 15.5
Uranium (ug/L) 26.9 26.5 20.3 23.6 23.9 19.6
MW-01 (Class
II)
Manganese (ug/L)
Tetrahydrofuran (ug/I.
Field pH (S.U.)
Sulfate (mg/l.; 838
NA 3.25
836
Required Semi-Annual Sampling Wells
NA
6.75
920
Selenium (ug/I.) 94.0 62.4
MW-03 (Class
III)
Field pH (S.U.) 6.5 - 8.5 6.23 6.13 6.37
Sulfate (mg/I.) 3663 3800
Nitrate + Nitrite (as N)
(mg/I.) 0.330
Fluoride (Mg/L) 0.68 0.77/
Field pH (S.U.) 6.5 - 8.5 6.40 6.41
MW-03A (Class
III)
Sulfate (mg/I.) 3640 3770
Nitrate + Nitrite (as N)
(mg/L) 1.3 NS NS NS
TDS (mg/L)
Selenium (ug/L) 104
MW-05 (Class
ID Uranium (ug/l.) 36.20
MW-12 (Class Selenium (ug/L)
Field pH (S.U.)
NS NS 6/4/2014
6.5 - 8.5 6.13 6.25
MW-15 (Class
III)
Selenium (ug/I.) 128.7
Field pH (S.U.) NS 9/2/2014
Ql 2014 Results Q2 2014 Results Q3 2014 Results Q4 2014 Results
Monitoring
Weil (Water
Class)
Constituent Exceeding
GWCL
GWCL in Current
GWDP
January 2014
Monthly Sample
Date
January
2014
Monthly
Result
February
2014
Monthly
Sample Date
February
2014
Monthly
Result
Ql 2014
Sample
Date
012014
Result
April 2014
Monthly
Sample
Date
April 2014
Monthly
Result
May 2014
Monthly-
Sample
Date
May 2014
Monthly
Result
Q2 2014
Sample
Date
Q2 2014
Result
April 2014
Monthly
Sample
Date
April 2014
Monthly
Result
May 2014
Monthly
Sample
Date
May 2014
Monthly
Result
Q3 2014
Sample
Date
Q3 2014
Result
October
2014
Monthly
Sample
Date
October
2014
Monthly
Result
Q4 2014
Sample Date
Q4 2014
Result
December
2014 Monthly
Sample Date
Required Semi-Annual Sampling Wells, continued
MW-18 (Class
III)
Thallium (ug/l)
Sulfate (mg/l.)
Held pH (S.U.)
TDS (mg/L)
1.95
1938.9
6.25-8.5 NA 2/19/2014
2.77
1650
6.16 NS NS
2.42
2020
3260
NA NS
Field pH (S.U.) 6.46
MW-19(Clas:
III) Gross Alpha minus Rn &
U (pCi/L) 2.36 NS 2/18/2014 NS NA <1.0
Nitrate + Nitrite (as N)
(mg/L) 2.0/
MW-23 (Class
III) Field pH (S.U.) 6.5 - 8.5 6/11/2014 NA
Cadmium (ug/L) 2.5 5.92 NA 2.91 NA
MW-24 (Class
III)
Fluoride (mg/L)
Sulfate (mg/L) 2903 NS NS 3/6/2014 5/30/2014 NS
Thallium (ug/L) 1.23
Field pH (S.U.) 6.5 - 8.5 5.89 6.07
Nitrate + Nitrite (as N)
(mg/L) 5.6 7.9S
MW-27 (Class
III)
Chloride (mg/L) 45.9 46.0 42.6
Sulfate (mg/I.) NS NS 5/28/2014 NS NS
TDS (mg/I.) 1075 1020
Gross Alpha minus Rn &
u (pan.)
Chloride (mg/I.) 105 113 114
Cadmium (ug/I.) 5.41
MW-28 (Class
III)
Uranium (ug/l.) NS 2/26/2014 NS
Vanadium (ug/I.', 30 109
Field pH (S.U.) 5.72
MW-29 (Class
Ill)
TDS (mg/L) 4500
Field pH (S.U.)
NS 2/25/2014
6.78
NS NS
6.10
MW-32 (Class
III)
Gross Alpha minus Rn &
U (pCi/L) 3.33 4.35
Chloride (mg/I.) 35.39
Field pH (S.U.) 6.4 - 8.5
GWCL values are taken from August 24, 2012 version of
GWDP.
NS = Not Required and Not Sampled
NR = Required and Not Reported
NA = Not Applicable
Exceedances are shown in yellow
Values in () parentheses are the field pH measurements lor the rcsamplcd analyses.
Table I - GWCL Exceedances for First Quarter 21)15 under the August 24. 2012 GWDP
| Ql 2015 Results
Monitoring
Well (Water
Class)
Constituent Exceeding
GWCL
GWCL in
August 24,
January 2015
Monthly
Sample Date
January 2015
Monthly
Result
Ql 2015
Sample Date
Ql 2015
Result
March 2015
Monthly
Sample Date
March 2015
Monthly
Result
Required Quarterly Sampling Wells
MW-11 (Clas
II)
Manganese (ug/L) 1/21/2015 177 2/3/2015
MW-14 (Class
III) Field pH (S.U.) 6.49 3/5/2015 6.05
MW-25 (Class
III)
Field pH (S.U.)
Cadmium (ug/L) 1/20/2015
Uranium (ug/l.) 6.54 6.81 6.43
Nitrate + Nitrite (as N)
0ng/L) 0.965
Uranium (ug/l.) 41.8 72.6
Chloroform (ug/l.; 70 3570 1190 1020
Chloride (mg/L) 59.9
MW-26 (Class
III) Carbon Tetrachloride
(ug/L)
1/21/2015 2/11/2015 3/4/2015
Field pH (S.U.)
Dichloromethane
(Methylene Chloride)
(ug/l.)
6.42 5.89
<1.0
:
6.95
Nitrate + Nitrite (as N)
(mg/L) 2.5 14.9
Chloride (mg/I.)
MW-30 (Class
Hi
Uranium (ug/I.)
3/3/2015
Field pH (S.U.) 6.50 6.41
Ammonia (mg/I.) 0.14 NS
Selenium (ue/I.; 34 37.2 40.9
6.32
Nitrate + Nitrite (as N)
(mg/l.) 20.9 18.7
MW-31 (Class
III)
TDS (mg/l.)
Chloride (mg/L) 143 1/20/2015 211 3/3/2015
Selenium (ug/L) 75.6
Field pH(S.U.)
Sulfate (mg/L) 532 623
19.8
Manganese (ug/L) 228
Thallium (ug/l)
MW-35 (Class
II)
Gross Alpha minus Rn &
U (pCi/L) 3.75 1/20/2015 5.61 3/4/2015
Field pH (S.U.) 6.22
Selenium (ug/L)
Uranium (ug/L; 21.8
3.81
6.26
Required Semi-Annual Sampling Wells
MW-01 (Class
II)
Manganese (ug/L)
Tetrahydrofuran (ug/L)
Field pH (S.U.)
Sulfate (mg/l.;
6.77 - 8.5 6.66
Selenium (ug/I.)
MW-03 (Class
III)
Field pH (S.U.)
Sulfate (mg/I.) 3663 NS
Nitrate + Nitrite (as N)
Ortg/L) 0.73
Fluoride (Mg/I.) 1.08
Field pH (S.U.)
MW-03A
(Class III)
Sulfalc i mg/l i
Nitrate + Nitrite (as N)
(mg/L)
TDS (mg/I.) 5805
Selenium (ug/L) 8') 94.1
MW-05 (Clas
11) Uranium (ug/L)
MW-12 (Class Selenium (ug/l.; 25
2/9/2015 30.0
Field pH (S.U.) 6.5 - 8.5 6.33
MW-15 (Class Selenium (ug/L)
Field pH (S.U.) 6.62 - 8.5 NS 6.50 NS
Ql 2015 Results
Monitoring
Well (Water
Class)
Constituent Exceeding
GWCL
GWCL in
August 24,
2012 GWDP
January 2015
Monthly
Sample Date
January 2015
Monthly
Result
Ql2015
Sample Date
Ql 2015
Result
March 2015
Monthly
Sample Date
March 2015
Monthly Sample
Frequency
Required Semi-Annual Sampling Wells, continued
MW-18 (Class
III)
Thallium (ue/1)
Sulfate (mg/L)
Field pH (S.U.)
TDS (mg/L)
1938.9
6.25-8.5
3198.77 3240
Semi-Annually
Scmi-Annually
Semi-Annually
Semi-Annually
Field pH (S.U.) 6.78-8.5
MW-19 (Class
III) Gross Alpha minus Rn &
U (pCi/L) 0.312
Nitrate + Nitrite (as N)
(mg/L) 2.xl
Semi-Annually
Semi-Annually
Semi-Annually
MW-23 (Class
III) Field pH (S.U.) Semi-Annually
Cadmium (ug/l.)
MW-24 (Class
III)
Fluoride (mg/I.) 0.36 0.397
Sulfate (mg/L)
Thallium (ug/L) 1.27
Field pH(S.U.)
Semi-Annually
Semi-Annually
Semi-Annually
Semi-Annually
Semi-Annually
Nitrate + Nitrite (a
(mg/L)
N)
MW-27 (Class
III)
Chloride (mg/l.) 38 44.2
Sulfate (mg/L) NS
TDS (mg/L) 996
Gross Alpha minus Rn &
U (pCi/I.)
Semi-Annually
Semi-Annually
Semi-Annually
Semi-Annually
Semi-Annually
Chloride (mg/l.)
Cadmium (ug/l.; 5.2
MW-28 (Class
III)
Uranium (ug/l.)
Vanadium (ug/I.)
Field pH (S.U.)
Semi-Annually
Semi-Annually
Semi-Annually
Semi-Annually
Semi-Annually
MW-29 (Class
III)
TDS (mg/l.) 4400 4430
Field pH (S.U.) 6.46 - 8.5 6.42
Semi-Annually
Semi-Annually
MW-32 (Clas
III)
Gross Alpha minus Rn &
U (pCi/L) 2.19
Chloride (mg/L)
Field pH (S.U.) 2/9/2015
Semi-Annually
Semi-Annually
Semi-Annually
GWCL values are taken from August 24, 2012 version of
GWDP.
NS = Not Required and Not Sampled
NR = Required and Not Reported
NA = Not Applicable
Exceedances are shown in yellow
Values in () parentheses are the field pH measurements for the resampled analyses.
gOBBBMBStSKSKBBBBBBBSB
Pursuant to the DRC letter of March 25, 2015, these constituents will no longer be
monitored on an accelerated schedule. These constituents will be dropped from this re
after this quarter. I